Periodical Maintenance; Precautions - JVC SR-9090U - High Resolution 960 Hour Density Instructions Manual

1 INTRODUCTION

1-2 Periodical Maintenance

This VCR incorporates precision mechanical parts which will collect dirt over time and ultimately deteriorate and wear out.
Over long periods of use, dirt and dust accumulates on the heads, drums and tape transport mechanisms. Dust which
penetrates the VCR (especially during outdoor use) also promotes the wear and deterioration of mechanical parts by causing
poor contact between tape and heads. This also prevents the VCR from maintaining video and audio quality at high levels.
To prevent wear and deterioration, clean the heads regularly using a head cleaning tape. However, because a head cleaning
tape alone cannot clean the entire tape transport mechanism, this should also be inspected periodically to prevent any
problems that could result from a sudden failure.
As replacement and adjustment of parts require advanced skills and specialized equipment, please contact the person in
charge of professional video equipment at your nearest JVC-authorized service agent for servicing.
Monitoring Usage Time
The total operation time reached by an ordinary home VCR
in 5 or 6 years may be reached by a professional VCR in
as few as 5 or 6 months. Therefore, it is important that the
total hours of operation be carefully monitored. An hour
meter in the on-screen display (see page 20) shows the
accumulated time. In the chart below, the hours
accumulated in each month are shown in relation to the
number of hours used per day. Times shown in the shaded
area indicate that maintenance should be performed.
Usage
time per
1 month 2 months 3 months 6 months 12 months
day
2 hours 60 120
8 hours 240 480
12 hours 360 720
24 hours 720 1440

1-3 Precautions

Handling and storage place
5 Avoid using the unit in places subject to the
following conditions:
• extreme heat or cold
• strong magnetic fields (do not use a transceiver within 2
meters of this unit)
• high humidity
• dust and soil
• vibrations
• variations in temperature
5 Use this unit in horizontal (flat position) only.
5 To avoid overheating the unit, do not block
ventilation slots or stack the units. If the internal
temperature rises too high, the tape may be
damaged.
Condensation
5 Condensation
When cold beer is poured into a glass, water drops
appear on the glass's surface. This phenomenon is
called "condensation". When condensation occurs on
the VCR's head drum and tape guides it may damage
the tape.
5 Condensation occurs in the
following cases:
• When the VCR is moved from a
cold place to a warm place.
• In a room that has just been heated
or in an area directly exposed to a
cooler.
• When there is excessive humidity.
180 360 720
720 1440 2880
1080 2160 4320
2160 4320 8640
Head drum
Video tape
Periodic Maintenance
Check or replace the following mechanical parts according
to the running time.
Running time
Drum ass'y (including heads)
Pinch rollers
Drive parts
^ : Cleaning
• Maintenance requirements may vary depending on the
operating environment and usage. The information
above should be used as a reference guide.
Replace the built-in lithium battery approximately every
two years.
5 Do not leave the unit in the Still or Record Pause mode
for a long time as this may damage the tape.
After about 3 minutes, this unit automatically enters the
Stop mode.
5 Handle the unit carefully
• Do not place anything heavy on the unit (a monitor,
etc.). A malfunction may occur.
• Do not put any foreign substance into the cassette
loading slot.
• Avoid violent shocks to the recording chassis during
transportation. Remove the cassette tape from the unit
for transportation.
5 Turn off the power to save electricity when not
using the unit.
5 When condensation is expected to occur
Turn the power of the VCR on before use.
5 If condensation has occurred
The VCR automatically ejects the cassette and the error
indication "E-08" blinks on the display. Operation is
disabled until the "E-08" indication on the display goes out.
REC STOP REC
CHECK
REW REVERSE PAUSE PLAY FF
TRACKING V. LOCK TIMER SEARCH DISPLAY LOCK
– + – +
FIELD REV FIELD ADV
1000H 2000H 3000H 4000H
^
^
^ ^ ^
: Check or replace as required.
: Replace
SR-9090U
REC
EJECT OPERATE
OPERATE
HDR
RESET/
CANCEL ON SCREEN
SHIFT
CNT RESET MENU TIME MODE
+
– S E T
7